Iowa Admin. Code r. 21-43.5
If official sampling and analysis of any registered Cornmercial fertilizer or soil conditioner indicates that the product does not meet the guarantees or claims made for it, or that the products do not meet the minimum plant nutrient values established by rule 21-43.1 (200), the secretary may notify the person guaranteeing the product that the quality of the fertilizer or soil conditioner must be improved prior to any further sale, distribution or offer for sale of such products in Iowa and the secretary may request that monetary reimbursement be made to purchaser to rectify the deficiency of the product reported by laboratory analysis and the monetary reimbursement be reported to the department. Reimbursement must be made within 30 days of the reported deficiency. In addition, if it appears to the secretary that the Cornposition of the article does not warrant the claims made for it, or if the article, its labeling or other material required by Iowa Code section 200.5(6) to be submitted to the secretary, do not Cornply with the requirements of the Iowa fertilizer law, the secretary may revoke, suspend or refuse to register any Cornmercial fertilizer or soil conditioner; or refuse to issue or revoke or suspend any license issued under Iowa Code chapter 200. This rule is intended to implement Iowa Code sections 200.5 and 200.14.
Iowa Admin. Code r. 21-43.5